Underground Power in Sydney: Cost, Process, and Is It Worth It?

Converting your overhead power to underground is one of the most satisfying upgrades you can make to a Sydney home. It removes the tangle of aerial wires, clears the way for a clean renovation or landscaping result, and takes the most storm-vulnerable part of your supply out of the equation. But it is also a job surrounded by questions — how much does it cost, how long does it take, and is it actually worth it? Here is what you need to know.

Why homeowners convert from overhead to underground

There are four reasons we are usually called for underground power installation:

• Appearance. Overhead service lines and the point of attachment on the wall are visually intrusive. Removing them gives a much cleaner facade — often the finishing touch on a renovation.
• Storm and tree resilience. Aerial lines are the part of your supply most likely to be brought down by storms or falling branches. Underground removes that risk almost entirely.
• Renovation and landscaping. A new roofline, second storey, or front-garden redesign frequently clashes with the existing overhead service. Going underground clears the obstruction.
• Coastal corrosion. Near the water — think the Eastern Suburbs or Northern Beaches — salt air perishes aerial cable faster, making underground a longer-lasting choice.

The process, step by step

Because the work connects to the network, it must be carried out by a Level 2 ASP. The typical process looks like this:

1. Feasibility and route. We confirm where the network connection point is (a pole, pit or pillar) and the best route to run the consumer mains underground to your switchboard.
2. Application. We lodge the connection application with your distributor — Ausgrid or Endeavour Energy depending on your suburb — and identify any council or restoration requirements where the trench crosses a footpath or driveway.
3. Trenching and conduit. We trench the route and lay the consumer mains in approved conduit at the required depth.
4. Connection. We establish the underground connection, install the switchboard provisions, and energise the new supply.
5. Overhead removal. We remove the redundant aerial service and point of attachment, and make good.

For most homes the physical work is completed within a few days; the overall timeline depends on the distributor approval and any council restoration over the trench.

What drives the cost

There is no single fixed price for underground power, because the cost is driven almost entirely by your site. The main factors are:

• Trench length — the distance from the network connection point to your switchboard.
• Surface type — trenching across lawn is cheap; crossing a concrete driveway, paving or a road is far more involved because of excavation and reinstatement.
• Restoration — making good driveways, paths and landscaping after the trench is backfilled.
• Where the network asset sits — if the pole or pit is on the opposite side of the street, the distributor may be involved at their asset, which affects method and cost.

Because of this variability, we always quote underground power on a site-specific basis rather than offering a headline figure that turns out to be wrong for your property.

Council and distributor involvement

Two parties typically have a say. The distributor (Ausgrid or Endeavour Energy) must approve the connection and may inspect the work. The council can be involved where the trench affects the footpath, nature strip or road — restoration to council standards is often required. As your ASP, we manage the distributor application and advise you on any council requirements so there are no surprises mid-job.

Does underground power add value?

While we cannot put a guaranteed figure on it, removing overhead lines almost always improves a property's street appeal, and it is frequently a prerequisite for achieving a clean architectural result on a renovation — which itself supports value. Just as importantly, it removes a recurring maintenance and storm-damage liability. For many owners, the combination of looks, resilience and a tidy finish is well worth it.

Who pays when the pole is on your boundary?

This is one of the most common questions we get. Responsibility for the supply is split at a defined point between the distributor's network and your private installation. Where a pole sits on or near your boundary, the consumer mains from the connection point to your switchboard are your responsibility — which is the portion the underground conversion covers. We confirm exactly where that responsibility sits as part of the feasibility assessment, so you know what is included before any work begins.

Should you upgrade at the same time?

Underground conversion is a natural moment to address other network-side work while the switchboard and supply are already being touched. Many owners combine it with a service upgrade — for example moving to three phase for ducted air conditioning or an EV charger — or with consumer mains replacement if the existing cable is undersized. Doing it together saves a second mobilisation and a second outage.

Where we work

We carry out underground power conversions right across Greater Sydney on both networks — from heritage homes in the Inner West and harbourside properties in Mosman to family homes in Kellyville and coastal homes in Coogee. If you are not sure which distributor covers you, our service areas guide breaks it down suburb by suburb.

Ready to find out what it would cost at your place?

The only way to know the real number is a site-specific quote. Get in touch with the details of your property and we will assess the route, confirm your distributor, and give you a clear, written price for converting your overhead power to underground — including the overhead removal and make-good.